import java.util.Scanner; public class Main { public static void main(String[] args) { // TODO Auto-generated method stub Scanner sc = new Scanner(System.in); int n =sc.nextInt(); int matrix[][] = new int[n][n]; for(int i=0;i<matrix.length;i++) { for(int j=0;j<matrix.length;j++) matrix[i][j] = sc.nextInt(); } System.out.println(cal(matrix)); } static int cal(int[][] matrix) { int sum = 0; for(int i=0;i<matrix.length;i++) for(int j=0;j<i+1;j++) sum+=matrix[i][j]; return sum; } } |
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